dataset : GLAS/ICESat 500 m Laser Altimetry Digital Elevation Model of Antarctica

National Snow & Ice Data Center Distributed Active Archive Center


GLAS/ICESat 500 m Laser Altimetry Digital Elevation Model of Antarctica

The Geoscience Laser Altimeter System (GLAS) instrument on the Ice, Cloud, and land Elevation Satellite (ICESat) provides global measurements of elevation, and repeats measurements along nearly-identical tracks; its primary mission is to measure changes in ice volume (mass balance) over time. This digital elevation model (DEM) of Antarctica is derived from GLAS/ICESat laser altimetry profile data and provides new surface elevation grids of the ice sheets and coastal areas, with greater latitudinal extent and fewer slope-related effects than radar altimetry. This DEM is generated from the first seven operational periods (from February 2003 through June 2005) of the GLAS instrument. It is provided on polar stereographic grids at 500 m grid spacing. The grid covers all of Antarctica north of 86° S. Elevations are reported as centimeters above the datums, relative to both the WGS 84 ellipsoid and the EGM96 geoid, in two separate elevation data files. A data quality map of the interpolation distance is distributed in addition to the elevation data. ENVI header files are also provided. The data are in 4-byte (long) signed integer binary files (big endian byte order) and are available via FTP.

Identified by : NSIDC-0304

This dataset was released on June 21, 2007.

The time range for this dataset is February 01, 2003 to June 30, 2005.

The spatial range for this dataset is -86° to -63° latitude, and -180° to 180° longitude. map (center)

This dataset uses data from an instance of the geoscience-laser-altimeter-system instrument on the ice-cloud-and-land-elevation-satellite platform.
DOI : 10.5067/K2IMI0L24BRJ
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